CANTON While Canton-based Radial Engine Innovations may not actually be reinventing the wheel, its embrace of century-old technology has allowed the reimagining of the internal combustion engine for the 21st Century. Along the way, and with any luck, companies like REI may also re-awaken the sleeping beast of a manufacturing economy in Northeast Ohio. "I always had a fascination with the internal combustion engine," said Mitch Boulton, the North Carolina-born, Iowa-bred founder of REI. "When I was a child I got to ride in a bi-plane that had a radial engine...